Will give if the great gatsby was set today, who would attend the parties? list names in the same manner as nick.

Honestly that should be an opinion. As you notice, people at gatsby's parties were wild,  and uninvited. Who in your opinion, would you feel would follow those same qualities? What celebrities are wild?

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

i feel like it is actually b.